if else mysql select

The great god says: In sql, you can use if else without casebelow to see, specifically why, did not figure out if there is a great God to know to provide the following information:MySQL can be used as an expression, or as a Process control statement

MySQL常用指令，java，php程序员，数据库工程师必备。程序员小冰常用资料整理MySQL common commands (for reference)The most common display commands are:1. Display the list of databases.show databases;2. Display the data table in the library:Use MySQL;Show tables;3, display the

Select *, if (SVA = 1, "male", "female") as ssva from tableame where id = 1Quote control flow Functions Case value when [compare-value] Then result [when [compare-value] Then result...] [else result] end case when [condition] Then result [when

Concrete Example 1. PHP Server ComponentsFor beginners, it is recommended to use the integrated server component, which already includes PHP, Apache, Mysql and other services, eliminating the time spent by developers in the tedious configuration

For content-driven Web sites, the key to the quality of the design is the relational database. In this tutorial, we have built our database using the MySQL relational database management system (RDBMS). MySQL is a popular choice for Web site

An error is reported when writing the following code:[Error] 1064-You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'end if 'at line 8 www.2cto.com create procedure

Mysql-proxy is a simple program that is located between your client side and the MySQL server to monitor, analyze, or change their communications. It is flexible, unlimited, and common uses include: load balancing, failure, query analysis, query

Case has two formats. Simple case function and case search function.--Simple case function when ' 1 ' then ' Male ' when ' 2 ' Then ' Women ' Else ' other ' end--case search function case when sex = ' 1 ' Then ' Man ' when sex = ' 2 '

Error code: 1064You have an error in your SQL syntax; check the manual that corresponds to your MySQL Server version for the right syntax to use near The error is reported because the if else statement in MySQL procedure uses the begin end

MySQL stored procedure SP explanation 1. Introduction to stored procedures The commonly used Operating Database Language SQL statements must be compiled and then executed before execution. the Stored Procedure (Stored Procedure) is a set of SQL